MC74F269

www.DataSheet4U.com MC74F269 8-BIT BIDIRECTIONAL BINARY COUNTER The MC74F269 is a fully synchronous 8-stage up/down counter featuring a preset capability for programmable operation, carry look-ahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the rising edge of the clock. Synchronous Counting and Loading Built-In Lookahead Carry Capability Count Frequency 115 MHz Typical Supply Current 95 mA Typical PIN ASSIGNMENT PE 24 P0 23 P1 22 P2 21 P3 20 VCC 19 P4 18 P5 17 P6 16 P7 15 TC CET 14 13 24 1 8-BIT BIDIRECTIONAL BINARY COUNTER FAST™ SCHOTTKY TTL J SUFFIX CERAMIC CASE 758-01 1 U/D 2 Q0 3 Q1 4 Q2 5 Q3 8 6 7 Q4 GND Q5 9 Q6 10 Q7 11 12 CP CEP 24 1 N SUFFIX PLASTIC CASE 724-03 24 1 DW SUFFIX SOIC CASE 751E-03 ORDERING INFORMATION MC74FXXXJ Ceramic MC74FXXXN Plastic MC74FXXXDW SOIC GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current  High Output Current  Low Parameter 74 74 74 74 Min 4.5 0 Typ 5.0 25 Max 5.5 70 –1.0 20 Unit V °C mA mA FAST AND LS TTL DATA 4-138 DataSheet 4 U .com www.DataSheet4U.com MC74F269 FUNCTION TABLE Inputs Operating Mode Parallel Load Count Up Count Down Hold Do Nothing CP ↑ ↑ ↑ ↑ ↑ ↑ U/D X X h l X X CEP X X l l h X CET X X l l X h PE l l h h h h Pn l h X X X X Outputs Qn L H Count Up Count Down qn qn TC (a) (a) (a) (a) (a) H H = HIGH voltage level steady stat...